Check out
iSSi Thumps too. I've been riding 'em for a year on one hybrid (I prefer platforms on hybrids, but clipless on my road bikes). I got the version with molded in pins, since I'm not a hardcore dirt rider and switch between various shoes and boots. They grip well enough even with wet and somewhat muddy soles. The slightly concave shape suits my feet just fine. I'm prone to arch cramps but have had no problems with these pedals.
Only gripe is one pedal has developed a slight, well... thump... after a year. I don't feel any looseness when I shake and twist the pedal by hand, but can feel a slight thunk on every pedal stroke while riding. It can probably be adjusted or rebuilt, I just haven't bothered yet. That's after about 2,000-3,000 miles of mostly casual riding, about 25% of that on some easy "gravel" on the MUP's crushed limestone/pea gravel chat trails.